Properly remove music cache

[fitness23]

I noticed that there is a post which resembled the problem that I am currently going through regarding music cache = http://www.html5gamedevs.com/topic/19075-how-do-i-actually-remove-an-audio-file-from-memory/

 

I was wondering if anybody knew of a way to fully remove the cache of a music file as the memory just seems to go up and up on my game. I currently use all of these below lines but none of them seem to fully remove the cache:

 

backgroundMusic.stop();
backgroundMusic.destroy();
backgroundMusic = null;
this.game.cache.removeSound(gameData.rooms[i].musicID);

I currently use v2.4.3.

Any help you can provide would be fantastic :)